Warning! Mount Semeru Erupts Again Early This Morning (Wednesday, January 28, 2026)

Mount Semeru in East Java erupted again on Wednesday (28/1/2026) at 04:24 AM WIB. In the last week, Mount Semeru has erupted 13 times.

Based on eruption information from the Center for Volcanology and Geological Hazard Mitigation (PVMBG) via the MAGMA Indonesia application, the height of the observed ash column reached None meters above the peak (None meters above sea level).

The visual eruption was not observed. The eruption was recorded on a seismograph with a maximum amplitude of 22 millimeters and a duration of 129 seconds.

(Read: Indications of Forest and Land Fire Area in Central Kalimantan Province in the Last Decade)

According to the MAGMA Indonesia volcanic activity report, Mount Semeru's activity level is at Level III (Alert). Seismicity observations on January 28, 2026, from 18:00-23:59 WIB showed 16 eruption tremors with amplitudes of 10-22 millimeters and durations of 60-178 seconds.

Furthermore, there were 2 avalanche tremors with amplitudes of 2-3 mm and durations of 70-103 seconds, and 12 exhalation tremors with amplitudes of 3-7 millimeters and durations of 39-67 seconds.

PVMBG advises against any activities in the southeast sector along Besuk Kobokan, as far as 13 kilometers from the summit (eruption center). Beyond that distance, people should not engage in activities within 500 meters from the riverbanks along Besuk Kobokan as there is a potential for hot cloud expansion and lava flows up to 17 kilometers from the summit.

Throughout 2026, MAGMA Indonesia has recorded 368 volcanic eruptions across Indonesia. Mount Semeru in East Java has erupted the most, with 195 eruptions.

(Read: West Kalimantan Produced the Most CO2 Emissions from Forest and Land Fires Until July 2023)